#!/usr/bin/python
# -*- coding: UTF-8 -*-

print("============================")
print("意：Python2.x 里，整数除整数，只能得出整数。如果要得到小数部分，把其中一个数改成浮点数即可。")

print "10/3.0 的值为：", 10/3.0
a = 21.0
b = 10.0
c = 0.0

print "a=",a,"b=",b,"c=",c

c = a + b
print "a + b 的值为：", c

c = a - b
print "a - b 的值为：", c

c = a * b
print "a * b 的值为：", c

c = a / b
print "a / b 的值为：", c

c = a % b
print "a % b 的值为：", c

# 修改变量 a 、b 、c
a = 2
b = 3
c = a**b
print "a**b 的值为：", c

a = 10
b = 5
c = a//b
print "a//b 的值为：", c